Mine-sheave.



I. N. .DERRICK & M. II/Il VANNI IVIINE SHEAVE.

APPLICATION FILED DEC|22| 19H5.

.Patented Mar. 27

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JOHN N. DERRICK AND MILLARD M. VANN, QF ROCKJVOOD, TENNESSEE.

. MINE-SHEAVE.

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Speeication of Letters Patent.

Patented Mar. 27, 1917.

To all whom z't may concern:

Be it known that we, Jol-IN N. Dnnnrok and MILLARD M. VANN, citizens of the United States, residing at Rockwood, 4in the county of Roane and State of Tennessee, have invented new and useful Improvements in Mine-Sheaves, of which the following is a specification.

rlhis invention relates to sheaves, especially adapted for use in connection with railway tracks in mines, or other places where haulage is on an incline.

The object of the present invention is 'to provide a sheave for use as above stated by means of which the movement of cars operated by rope haulage is facilitated.

Another object of the invention is to provide a sheave that can be readily positioned in any mine track irrespective of the condition of the ties, the supporting element of the sheave replacing the tie and acting as a gage bar for the rails.

A further object of the invention is the provision of a device of this class which will combine the maximum of strength with the minimum cost of construction, consistent with its strength, and which will combine simplicity and long life, there being only one wearing part which may be easily and cheaply replaced.

With the foregoing objects in view the invention consists of a combined gage and supporting bar adapted to be clamped to the base of the rails, a sheave mounted upon a stationary vertical pin keyed to the said bar, a bearing arm bolted to the bar and supporting the upper end of the pin and a rope guiding element for directing the rope or cable into position.

In the drawings Figure l is a side elevation of the device applied to a track; and

Fig. 2 is a top plan view of the same.

Ordinarily it is the practice to secure a sheave for use in connection with rope haulage in mines, to a tie between the tracks. This tie may become worn or rotten, and it is often difiicult to secure the sheave thereto in a manner to prevent its continual pulling out and a consequent loss of time and annoyance caused thereby. rllhe present inend of the bar is provided with an upturned rail engaging end 2, for engagement with one flange of a rail 3, the opposite flange of this rail being engaged by a removable clamp e secured to the bar by a countersunk post 5 and a nut 6. The opposite end of the bar 1 is secured to one flange of the rail 7 by a removable clamp 8 similar to the clamp l just described. A combined clamp and bearing arm 9 is secured tc the bar by the countersunk. bolts 10, one end of this arm having a clamping member 11 for engagement with the rail 7 leyed'within an opening 12 formed in the bar 1 is a vertical pin 13, the key being shown at 14C. This pin supports asheave 15, and at its upper lend is provided with a head 16 countersunk into one end of the bearing arm 9 las shown at 17. Spacing washers 18 are provided at each end of the sheave 15, upon the pin 13.

1n order 'to readily guide the rope or cable into position within the lianges of the sheave, the bar l is formed with a guiding element in the form of an inclined raised portion 19. This guiding element is shown in Fig. 1 as located in juxtaposition to the lower flange of the sheave 15, so 'that when the rope or cable is pulled over the surface of the bar 11 it will be readily guided into position upon the sheave.

It will be seen from the foregoing description when taken in connection with the accompanying drawings that 'the invention provides a simple and eliicient sheave for use in connection with rope haulage through mines, and one that may be readily positioned at any point along the track irrespective of the condition of the ties.

Having described the invention, what is claimed is;

1. rl`he combination with a track, of a bar secured thereto, a sheave supported upon said. bar and an inclined guiding element adjacent the lower end of said sheave.

2. The combination with a track, of a bar secured thereto, a sheave supported upon the bar and supporting the upper end of the said bar and a guiding element formed in pin, and a guiding' element formed upon said bar adjacent said sheave. said bal' adjacent s'aid sheave. 10

3; The combination with a track, of a In testimony whereof We aHiX our signa- 5 bar secured thereto, clamps for said bar, a, tures.

flanged pulley mounted upon a Vertical pin JOHN N. DERRICK. keyed to said bar, a bearing arm secured to MILLARD M. VANN.

Copies of this patent muy be obtained for ve cents each, by addressing the "Commissioner of Patents,

' Washington, D. C. 

